If her will went to probate the town clerk's office might hold a copy. Alburg is a very small town in a small (pop 6K) county. They have a historical society but their web site does not provide a phone number. The phone number for the town clerk is (802)796-3468. I've done a lot of research there and they have always been helpful.
Incidentally, Elverette Holcomb was born in Isle LaMotte and is descended from Amos Holcomb, a revolutionary war soldier. Allen Stratton devotes several pages to the Holcomb family in his History of Isle LaMotte. Her mother Almeda Hall was a descendent of Enoch Hall a revolutionary war soldier. The Hall's were "pioneer settlers (Stratton) of Isle LaMotte.
You can access Stratton's book on Google Books but I don't know if you can do a comprehensive search w/o buying it. I have a copy if you can't get the info on line.